Collinsville, OH Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Collinsville, OH in one place.
A chance of showers and thunderstorms after 7am. Partly sunny, with a high near 90. Heat index values as high as 101. West wind 1 to 7 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
Local Weather Overview
This forecast page for Collinsville, OH is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 16, 2026 2:35 AM EDT.
The active forecast window currently covers Sep 17 to Sep 22, 2026 for Collinsville, OH.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 22, 2026
- Latest sync
- Sep 16, 2026 2:35 AM EDT
- Forecast office
- ILN
- Source
- NOAA / NWS
Daily Outlook
This Week in Collinsville
Thursday looks like the warmest upcoming period in Collinsville at 90 degrees F.
Monday Night is the coolest period ahead with temperatures near 62 degrees F.
The strongest winds are forecast for Monday Night at about 5 to 10 mph NE.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 16, 2026 2:35 AM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- ILN
- Radar station
- KILN
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms. Partly cloudy, with a low around 68. North wind 2 to 6 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
A slight chance of rain showers before 8am. Partly sunny, with a high near 83. Chance of precipitation is 20%.
Partly cloudy, with a low around 63.
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 40%.
A chance of rain showers. Mostly cloudy, with a high near 78.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Chance Showers And Thunderstorms
|
90°F |
1 to 7 mph
W
|
|
Thursday Night
Sep 17
|
Chance Showers And Thunderstorms
|
68°F |
2 to 6 mph
N
|
|
Friday
Sep 18
|
Slight Chance Rain Showers then Partly Sunny
|
83°F |
3 to 8 mph
NE
|
|
Friday Night
Sep 18
|
Partly Cloudy
|
63°F |
2 to 8 mph
E
|
|
Saturday
Sep 19
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
88°F |
2 to 7 mph
S
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms
|
68°F |
6 mph
S
|
|
Sunday
Sep 20
|
Chance Rain Showers
|
87°F |
3 to 9 mph
SW
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
66°F |
5 to 9 mph
NE
|
|
Monday
Sep 21
|
Chance Showers And Thunderstorms
|
82°F |
5 to 9 mph
SW
|
|
Monday Night
Sep 21
|
Chance Showers And Thunderstorms
|
62°F |
5 to 10 mph
NE
|
|
Tuesday
Sep 22
|
Chance Rain Showers
|
78°F |
6 to 10 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Collinsville.